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API · /domain-api

Domain Parser API

healthy 4,096 Subscribers

Parse any hostname or URL with the Public Suffix List. Split a domain into its subdomain, registrable domain (eTLD+1) and public suffix (eTLD), or fetch just the suffix or just the registrable domain. Handles full URLs, internationalized (punycode) domains, IP addresses, multi-level suffixes like co.uk and com.au, and — when you ask for it — private suffixes such as github.io and s3 buckets. Built on an always-current Public Suffix List and served entirely in-memory, so responses are instant and the service is always available. Ideal for cookie and domain scoping, analytics attribution, email and link validation, security and anti-abuse, and devops tooling.

#domain #dns #psl #tld #url #dev-tools
api.oanor.com/domain-api
Get an API key Try in playground → Contact provider

Machine-readable spec so AI agents can integrate this API.

/api/domain-api/openapi.json
/api/domain-api/llms.txt

Discovery: GET /api/index.json lists every API.

API health

healthy
Uptime
100.00%
Server probes · 24h
Avg latency
80 ms
Server probes · 24h
Subscribers
4,096
active
Total calls
12
last 7 days
status Full status page → · 12 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

Free

  • 5,000 calls / month
  • 5 requests / second
  • Hard cap (429 above quota, no overage)
  • 5,000 requests/month, 5 req/s
  • Parse, suffix & registrable
  • Always-current Public Suffix List
  • No credit card
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Basic

€3.00 /month

  • 150,000 calls / month
  • 20 requests / second
  • Hard cap (429 above quota, no overage)
  • 150,000 requests/month, 20 req/s
  • URL, IDN & IP handling
  • Private-suffix option (github.io…)
  • Commercial use, email support
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Pro

€9.00 /month

  • 1,000,000 calls / month
  • 50 requests / second
  • Hard cap (429 above quota, no overage)
  • 1,000,000 requests/month, 50 req/s
  • High-volume domain parsing
  • eTLD+1 & multi-level suffixes
  • Priority email support
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Mega

€25.00 /month

  • 6,000,000 calls / month
  • 150 requests / second
  • Hard cap (429 above quota, no overage)
  • 6,000,000 requests/month, 150 req/s
  • Analytics & anti-abuse scale
  • Maximum concurrency
  • Priority support
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Built by

P
PremiumApi

Related APIs

Other APIs with overlapping tags.

WHOIS API

Domain and IP registration lookups via RDAP — the modern, structured successor to WHOIS. Get the registrar, registration / update / expiry dates, status codes, nameservers, DNSSEC state, and IP network ownership (CIDR, organization, country).

api.oanor.com/whois-api

DNS Lookup API

Resolve DNS records — A, AAAA, MX, NS, TXT, CNAME, SOA, SRV, CAA, PTR — for any domain, fetch all common records in a single call, or run a reverse PTR lookup for an IPv4 address. Backed by Google DNS-over-HTTPS. Ideal for devops tooling, uptime and email-deliverability checks (SPF/DKIM/DMARC), security research and domain monitoring.

api.oanor.com/dns-api

URL Tools API

Unfurl link previews — title, description, image, site name and favicon (Open Graph + meta tags) — and expand / unshorten URLs by following redirects to their final destination. Perfect for chat unfurls, link cards and resolving short links.

api.oanor.com/url-api

Astronomy API

A fast, fully-local astronomy and ephemeris engine: compute the equatorial (right-ascension/declination) and horizontal (azimuth/altitude) positions of the Sun, Moon and all planets for any observer and moment, get precise rise, set and transit (culmination) times for any body, read detailed lunar state (phase angle, named phase, illuminated fraction, apparent magnitude, geocentric distance, age since the last new moon and the dates of the next new/first-quarter/full/last-quarter moons), and list the exact equinoxes and solstices of any year. Every endpoint accepts input via the query string or the request body. Pure server-side computation (no third-party upstream), so responses are instant and always available. Ideal for weather and tide apps, astrophotography planners, calendars, solar/energy tools, Islamic and lunar calendars, and education.

api.oanor.com/astronomy-api

Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for Domain Parser API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call Domain Parser API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for Domain Parser API?
Free tier allows 1 request per second. Paid plans scale up to 50 requests per second on the Mega tier. Hard limits return HTTP 429 above the quota — no surprise overage charges.
How much does Domain Parser API cost?
Domain Parser API has a free tier with 100 calls / month. Paid plans start at €3.00 / month with higher quotas and faster rate limits.
Can I cancel my subscription anytime?
Yes. Plans are billed monthly and you can cancel anytime from your billing dashboard. No long-term contracts and no cancellation fee.
Is Domain Parser API GDPR-compliant?
All requests to Domain Parser API go through our EU-based gateway. Your upstream API key never leaves our server and no personal data is shared with the upstream provider beyond the request you send.

Pick an endpoint from the list on the left to see its details and try it.

Code snippets

Sign up to get an API key, then call any path under your slug.

curl https://api.oanor.com/domain-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/domain-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/domain-api/SOME_PATH");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
$response = curl_exec($ch);
import requests
r = requests.get(
    "https://api.oanor.com/domain-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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